//
//  NSNull+SMCategory.h
//  ZhiBo
//
//  Created by huangtie on 2017/11/17.
//  Copyright © 2017年 huangtie. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSNull (SMCategory)

@property (readonly, nonatomic) NSInteger length;
@property (readonly, nonatomic) NSInteger count;

@end
